Revolver with pivotable cylinder



Jan. 20, 1970 G. H. ROHM REVOLVER WITH PIVOTABLE CYLINDER Filed June 4, 1968 INVENTOR GJEWFH (FMS? RQHM Un t States Farm Int. Cl. F ne N00 US. Cl. 42---62 l i ABSTRACT OF ruizfmsciiosunn A revolver in which the cartridge cylinder is mounted in the revolver frame. so. asto be rotatable about the axis of an ejector pin which is removable from the frame and cylinder so that 'the cylinder may" then be pivoted outwardly toward one side of the frame on an arm which is pivotably secured to the frame. After being removed, the ejector pin may be used for pushing the individual cartridges or cartridge cases out ofcylinder.

The present invention relates to a revolver which has a cartridge cylinder which maybe pivoted out of the revolver frame toward one side by means of an arm which is pivotably secured to the frame, and in which an ejector pin is slidable in coaxial bores in theframe and in the cylinder when the cylinder is pivoted into the frame.

Most revolvers of this type as previously designed are provided with an ejector pin which carries an ejector star which, when the cylinder is pivoted out of the frame, and the ejector pin is moved toward the rear of the gun, ejects all of the cartridges or cartridge cases from the cylinder. When the cylinder is pivoted into the frame, the eject r pin which remains at all times in thecylinder engages into an aperture in the frame part carrying the barrel which is open in the pivoting direction of the cylinder, and the pin then passes through the arm on which the cylinder is mounted. In order to secure the cylinder in the inwardly pivoted position, it is known to mount the cylinder on a bearing pin which is slidable in the frame and may be retracted by means of a pawl which is accessible on the side plate of the revolver grip when the cylinder is to be released to be pivoted outwardly. In place of locking the cylinder in this manner, it is also known to provide the part of theejector pin which projects underneath the barrel fromthe cylinder and the pivoting arm with a conical sleeve which is slidable on the ejector pin and resiliently supported relative to the enlarged head of the pin and adapted to engage into the frame aperture adjacent to the barrel into which the ejector pin is inserted. Although all of these revolver constructions as above described have proved to be very successful, their manufacture is rather complicated and therefore expensive.

In order to avoid these disadvantages, it is also known to provide a revolver with a cylinder which is not pivotable out of the frame but rotatably mounted on a hollow shaft which is inserted into the frame and held in position by an ejector pin which extends through this shaft and is screwed to the frame. Sucha revolver construction requires, however, a special closure cap for the cylinder which is pivotably mounted on the frame and must be pivoted away from the cylinder vvhen the cylinder is to be loaded or unloaded. There are other known revolver constructions which avoid the last-mentioned disadvantage by being provided with a cylinder which has to-be removed entirely from the frame in order to permit the cylinder to be loaded or unloaded. Such a manipulation of a revolver is, however, rather complicated and bothersome.

3 Claims 3,490,164 Patented Jan. .20., 1 970,

-.It is an object of the present invention to provide a revolver of the type as first mentioned above which may be easily and. inexpensively manufactured and permits the cartridge cylinder to be very easily loaded and unloaded. 7

For attaining this object, the invention provides the front and rear walls of the frame defining the aperture into which the cylinder is pivoted with bores which extend coaxilly to the central bore of the cylinder when the cylinder is pivoted into the aperture, and it further provides an ejector pin which may be inserted into the coaxial bores and through the pivotable arm on the cylinder and may then be locked to the frame. When the cylinder is to be pivoted outwardly, the ejector pin may be un locked and withdrawn entirely from the revolver, and it may then be used for pushing the cartridges. or cartridge outer end of the ejector pin which projects from the bore in the front wall of the frame carrying the barrel with a knurled cylindrical handle which is. located underneath the barrel, and it further provides the part between this handle and the pin itself with a screw thread by means of which the ejector pin may be screwed into a corresponding female thread in the mentioned bore in the front wall of the frame. The bore in the rear wall of the frame into which the ejector pin engages is provided in the form of a socket hole. In order to permit this socket hole to be made of the smallest admissible diameter, the invention further provides the end portion of the ejector pin which is to engage into this socket hole of a substantially corresponding diameter which, however, is smaller than that of the remainder of the pin.

The advantages which are attained by the invention primarily consist in and are due to the fact that the cylinder is held in the inwardly pivoted position in the revolver frame solely by means of the ejector pin and not by any additional elements. When the ejector pin is unscrewed from the frame and withdrawn from the cylinder, the pivoting arm and the frame, the cylinder may be pivoted outwardly in order to permit it to be loaded or unloaded. For unloading the cylinder, the free ejector pin may be used for pushing the cartridges or cartridge cases out of their bores in the cylinder. A revolver according to the invention therefore no longer requires an ejecting star or any additional means aside from the ejector pin for locking the cylinder in the inwardly pivoted position as were required in the revolvers of the known types as previouslyy described.

The features and advantages of the present invention will become further apparent from the following detailed description thereof which is to be read with reference to the accompany drawings, in which FIGURE 1 shows, partly in longitudinal section, a side view of a revolver according to the invention, while FIGURE 2 shows a cross section which is taken along the line 11-11 of FIGURE 1.

The revolver as illustrated in the drawings comprises a cylinder 2 which is pivotable out of the frame 1 toward one side thereof. Cylinder 2 is for this purpse rotatably mounted on a tubular bushing 3 which is integral with and projects from an arm 4 which is pivotably mounted on a bearing pin 5 on the frame 1. The part of frame 1 carrying the barrel 6 is provided underneath the barrel with a bore 8 which, when the cylinder 2 is pivoted to its inner position, extends coaxially to central bore 7 of cylinder 2. This bore 8, the bore in bushing 3, and the central bore 7 in cylinder 2 are then adapted to receive an ejector pin 9 which is axially slidable through the cylinder 2 so that its end 14 may engage into a socket hole 11 in frame 1. On its outer end, the ejector pin 9 is '7 provided with a knurled cylindrical handle 12 and between this handle and the pin 9 itself with a screw thread for screwing the ejector pin in a corresponding female screw thread 13 in the bore 8 of the frame. The socket hole 11 in frame 1 is preferably made of the smallest admissible diameter and the end portion 14 of the ejector pin 9 which is inserted in to this socket hole is therefore made of a smaller diameter than the main part of this pin which, of course, should be smaller than the diameter of the cartridge bores 15 in the cylinder 2 so as to permit the ejector pin 9 to be easily inserted into these bores to eject the cartridges or cartridge cases.

Having thus fully disclosed my invention, what I claim is:

1. A revolver having a frame and a barrel secured to said frame, said frame having front and rear walls spaced from each other so as to define an aperture and each having a bore coaxial to each other, an arm pivotably secured at one end to said frame, a cartridge cylinder having a central bore rotatably mounted on the other end of said arm and adapted to be pivoted on said arm into said frame aperture and out of said aperture to one side of said frame, and an ejector pin removably inserted into bores when said cylinder is pivoted into said aperture and all of said bores are coaxial to each other, and

means for securing said pin to said frame when inserted into said bores and for thereby securing said cylinder rotatably in said aperture.

2. A revolver as defined in claim 1, in which said ejector pin has a knurled cylindrical handle on its front end adapted to project from said bore in said front'wall of said frame underneath said barrel, said securing means comprising an internal screw threadin said front-wall bore, and an external screw thread on said ejector pin between said handle and the pin itself for screwing said pin into said threaded bore.

3. A revolver as defined in claim 2, in which said bore in said rear wall forms a socket hole of a small diameter; said ejector pin having an end por tion adapted to engage into said socket hole and having a diameter substantantially corresponding to the diameter of said socket hole but smaller than the, remainder of said pin. 0

References Cited UNITED STATES PATENTS 702,607 6/1902 Wesson 42 -62 3,177,602 4/1965 Geber 42-62 BENJAMIN A. BORCII-IELT, Primary Examiner CHARLES T. JORDAN, Assistant Examiner 

